package overview;

import oop4.Dog;
import oop4.Pet;

/**
 * @author oldliu
 * @since 1.0
 */
public class Son extends Father {
    @Override
    public Dog a() {
        return null;
    }

    @Override
    public void b()   {

    }

    @Override
    public void c() {

    }
}
